LockBit Claims 5TB Data Theft in Ransomware Attack on Foxsemicon
Foxsemicon Integrated Technology Inc. (FITI), a Taiwanese semiconductor parts manufacturer affiliated with Hon Hai Technology Group, said it was hit by a ransomware attack that defaced its website and displayed a threat to leak allegedly stolen data. The attackers, identified in reporting as the LockBit ransomware gang, claimed they had stolen and encrypted 5TB of company data, including customer and employee personal information, and warned they would publish it on a darknet leak site if a ransom was not paid.
Foxsemicon told the Taiwan Stock Exchange it restored its website the same day it detected the incident, brought in security experts, and did not expect a significant impact on operations. The company did not disclose any ransom demand and had not confirmed whether customer or employee data was actually exfiltrated, while parts of its website reportedly remained inaccessible and search results continued to show the attackers' message. The incident stood out because website defacement is considered unusual for LockBit, which more commonly pressures victims through its extortion portal.

Get ahead of threats like this
Mallory correlates global threat intelligence with your attack surface — know if you’re exposed before adversaries strike.
How this story unfolded
3 events from the most recent confirmed update back to the earliest known activity.
LockBit linked to Foxsemicon ransomware incident in media reporting
Subsequent reporting attributed the Foxsemicon attack to the LockBit ransomware gang, noting that the website defacement was unusual for the group. Reports also said parts of the site remained inaccessible and search results still displayed the attackers' message.
Foxsemicon restores website and notifies Taiwan Stock Exchange
Foxsemicon said it restored its website the same afternoon after detecting the attack, engaged external security experts, and reported to the Taiwan Stock Exchange that the incident was not expected to significantly affect operations. The company did not disclose the ransom demand or confirm any actual data leak.
Foxsemicon detects ransomware attack and website defacement
Foxsemicon Integrated Technology Inc. detected a ransomware incident in which its website was defaced with a ransom note. The attackers claimed they had stolen and encrypted 5 TB of data, including customer and employee information, and threatened to leak it if a ransom was not paid.
Sources
2 references tracked. Mallory keeps watching after this page renders.
See the full picture, correlated to your attack surface.
Map indicators from this story to your assets and identify affected systems in minutes.
Every observed campaign, victim, and pivot linked to actors named in this story.
Malware, exploits, and IOCs connected to the activity described here.
YARA, Sigma, and Snort rules deployed to your SIEM as soon as they’re published.
Get matching new stories delivered to your team as they break — not the next morning.
Ask questions about this story and take action on the answers.


